Use these Plastic Base Ten manipulatives to engage students in concrete demonstrations of place value and base ten concepts. Units are made of durable, washable plastic for years of hands-on activities. Great for helping students understand abstract base ten concepts, including place value, estimation, operations, and more.Ages 6 and up.Starter Set for use with 3-4 students.Includes:100 Individual units30 Rods10 Flats1 CubeClass Set is 823-pieces perfect for classrooms of 20-25 students. The set includes 600 units, 200 rods, 20 flats, and 3 cubes, all stored in a convenient box.